// Copyright (C) 2003-2009 Dolphin Project.

// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, version 2.0.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License 2.0 for more details.

// A copy of the GPL 2.0 should have been included with the program.
// If not, see http://www.gnu.org/licenses/

// Official SVN repository and contact information can be found at
// http://code.google.com/p/dolphin-emu/

#ifndef _XFMEMLOADER_H_
#define _XFMEMLOADER_H_


#include "Common.h"

/////////////
// Lighting
/////////////

#define XF_TEXPROJ_ST   0
#define XF_TEXPROJ_STQ  1

#define XF_TEXINPUT_AB11 0
#define XF_TEXINPUT_ABC1 1

#define XF_TEXGEN_REGULAR 0
#define XF_TEXGEN_EMBOSS_MAP 1 // used when bump mapping
#define XF_TEXGEN_COLOR_STRGBC0 2
#define XF_TEXGEN_COLOR_STRGBC1 3

#define XF_SRCGEOM_INROW 0 // input is abc
#define XF_SRCNORMAL_INROW 1 // input is abc
#define XF_SRCCOLORS_INROW 2
#define XF_SRCBINORMAL_T_INROW 3 // input is abc
#define XF_SRCBINORMAL_B_INROW 4 // input is abc
#define XF_SRCTEX0_INROW   5
#define XF_SRCTEX1_INROW   6
#define XF_SRCTEX2_INROW   7
#define XF_SRCTEX3_INROW   8
#define XF_SRCTEX4_INROW   9
#define XF_SRCTEX5_INROW   10
#define XF_SRCTEX6_INROW   11
#define XF_SRCTEX7_INROW   12

#define GX_SRC_REG 0
#define GX_SRC_VTX 1

struct Light
{
    u32 useless[3]; 
    u32 color;    //rgba
    float a0;  //attenuation
    float a1; 
    float a2; 
    float k0;  //k stuff
    float k1; 
    float k2; 
    union
    {
        struct {
			float dpos[3];
            float ddir[3]; // specular lights only
        };
        struct {
            float sdir[3];
            float shalfangle[3]; // specular lights only
        };
    };
};

#define LIGHTDIF_NONE  0
#define LIGHTDIF_SIGN  1
#define LIGHTDIF_CLAMP 2

#define LIGHTATTN_SPEC 0 // specular attenuation
#define LIGHTATTN_SPOT 1 // distance/spotlight attenuation
#define LIGHTATTN_NONE 2
#define LIGHTATTN_DIR 3

union LitChannel
{
    struct
    {
        u32 matsource      : 1;
        u32 enablelighting : 1;
        u32 lightMask0_3   : 4;
        u32 ambsource      : 1;
        u32 diffusefunc    : 2; // LIGHTDIF_X
        u32 attnfunc       : 2; // LIGHTATTN_X
        u32 lightMask4_7   : 4;
        u32 unused         : 17;
    };
    u32 hex;
    unsigned int GetFullLightMask() const
    {
        return enablelighting ? (lightMask0_3 | (lightMask4_7 << 4)) : 0;
    }
};

union INVTXSPEC
{
    struct
    {
        u32 numcolors : 2;
        u32 numnormals : 2; // 0 - nothing, 1 - just normal, 2 - normals and binormals
        u32 numtextures : 4;
        u32 unused : 24;
    };
    u32 hex;
};

union TXFMatrixIndexA
{
    struct
    {
        u32 PosNormalMtxIdx : 6;
        u32 Tex0MtxIdx : 6;
        u32 Tex1MtxIdx : 6;
        u32 Tex2MtxIdx : 6;
        u32 Tex3MtxIdx : 6;
    };
    struct
    {
        u32 Hex : 30;
        u32 unused : 2;
    };
};

union TXFMatrixIndexB
{
    struct
    {
        u32 Tex4MtxIdx : 6;
        u32 Tex5MtxIdx : 6;
        u32 Tex6MtxIdx : 6;
        u32 Tex7MtxIdx : 6;
    };
    struct
    {
        u32 Hex : 24;
        u32 unused : 8;
    };
};

struct Viewport
{
	float wd;
	float ht;
	float zRange;
	float xOrig;
	float yOrig;
	float farZ;
};

union TexMtxInfo
{
    struct 
    {
        u32 unknown : 1;
        u32 projection : 1; // XF_TEXPROJ_X
        u32 inputform : 2; // XF_TEXINPUT_X
        u32 texgentype : 3; // XF_TEXGEN_X
        u32 sourcerow : 5; // XF_SRCGEOM_X
        u32 embosssourceshift : 3; // what generated texcoord to use
        u32 embosslightshift : 3; // light index that is used
    };
    u32 hex;
};

union PostMtxInfo
{
    struct 
    {
        u32 index : 6; // base row of dual transform matrix
        u32 unused : 2;
        u32 normalize : 1; // normalize before send operation
    };
    u32 hex;
};

struct XFRegisters
{
    u32 posMatrices[256];           // 0x0000 - 0x00ff
    u32 unk0[768];                  // 0x0100 - 0x03ff
    u32 normalMatrices[96];         // 0x0400 - 0x045f
    u32 unk1[160];                  // 0x0460 - 0x04ff
    u32 postMatrices[256];          // 0x0500 - 0x05ff
    u32 lights[128];                // 0x0600 - 0x067f
    u32 unk2[2432];                 // 0x0680 - 0x0fff
    u32 error;                      // 0x1000
    u32 diag;                       // 0x1001
    u32 state0;                     // 0x1002
    u32 state1;                     // 0x1003
    u32 xfClock;                    // 0x1004
    u32 clipDisable;                // 0x1005
    u32 perf0;                      // 0x1006
    u32 perf1;                      // 0x1007
    INVTXSPEC hostinfo;             // 0x1008 number of textures,colors,normals from vertex input
    u32 nNumChans;                  // 0x1009
    u32 ambColor[2];                // 0x100a, 0x100b
    u32 matColor[2];                // 0x100c, 0x100d
    LitChannel color[2];            // 0x100e, 0x100f
    LitChannel alpha[2];            // 0x1010, 0x1011
    u32 dualTexTrans;               // 0x1012
    u32 unk3;                       // 0x1013
    u32 unk4;                       // 0x1014
    u32 unk5;                       // 0x1015
    u32 unk6;                       // 0x1016
    u32 unk7;                       // 0x1017
    TXFMatrixIndexA MatrixIndexA;   // 0x1018
    TXFMatrixIndexB MatrixIndexB;   // 0x1019
    Viewport viewport;              // 0x101a - 0x101f
    float projection[7];            // 0x1020 - 0x1026
    u32 unk8[24];                   // 0x1027 - 0x103e
    u32 numTexGens;                 // 0x103f
    TexMtxInfo texMtxInfo[8];       // 0x1040 - 0x1047
    u32 unk9[8];                    // 0x1048 - 0x104f
    PostMtxInfo postMtxInfo[8];     // 0x1050 - 0x1057
};

#define XFMEM_POSMATRICES        0x000
#define XFMEM_POSMATRICES_END    0x100
#define XFMEM_NORMALMATRICES     0x400
#define XFMEM_NORMALMATRICES_END 0x460
#define XFMEM_POSTMATRICES       0x500
#define XFMEM_POSTMATRICES_END   0x600
#define XFMEM_LIGHTS             0x600
#define XFMEM_LIGHTS_END         0x680


extern XFRegisters xfregs;

void InitXFMemory();

void XFWritten(u32 transferSize, u32 baseAddress); 

void LoadXFReg(u32 transferSize, u32 baseAddress, u32 *pData);

void LoadIndexedXF(u32 val, int array);

#endif
